Combination-boiler.



S. G. M. ANDERSON.

COMBINATION BOILER.

APPLICATION FILED 0cT.20, 1917.

1 ,291,708. Patented Jan. 2l, 1919.

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GOMBINATION-BOILER.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application led October 20, 1917. Serial No. 197,675.

To all whom t may concern:

Be it known that I, SWEN Cr. M. ANDER- soN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Combination- Boilers, of which the following is a speciiication. l

This invention relates to combination boilers, oneof the main objects of the invention being to produce a sectional boiler either for hot water .heating or steam generating purposes, said boiler having a novel arrangement of tubes and sectional headers which render the cleaning of the boiler tubes usually easy and inexpensive.

Another object of the invention is to provide a boiler of the class referred to einbodying in conjunction therewith a novel arrangement of electric heating units, the arrangement being such that the tubes of the boiler are quickly and uniformly heated. These electric heating units are so arranged that they may be connected to a source of electrical energy either in series or in multiple.

The boiler is especially adapted for use as an instantaneous water heater and may be installed in a number of ways such as by supporting the same in a brick structure or on a cast iron casing. Where electrically heated, the boiler should be inclosed in an air-tight casing so as to conserve the heat.

With the above and other objects in View, the invention consists in the novel construction, combination and arrangement of parts, herein described, illustrated and claimed.

In the accompanying drawings Figure 1 is a top plan view of the improved heater.

Fig. 2 is a front elevation thereof.

Fig. 3 is a detail view of one of the electrical heating units.

Fig. 4 is an edge view thereof.

Fig. 5 is a front elevation of the heater with'the tubes arranged in multiple series.

The boiler contemplated in this invention is of sectional construction and made up of any desired number of units. This enables a boiler of any desired capacity to be produced by simply increasing or decreasing the number of units.

The boiler in the preferred embodiment thereof comprises front and rear headers l and 2, respectively, each header being made up of a plurality of blocks or sections 3 of rectangular formation, it being preferred to make each block of suflicient size to receive the adjacent ends of two parallel water tubes 4: as clearly indicated in Figs. 2 and 5. rlhe blocks or sections 3 may be arranged either horizontally as shown in Fig. 2 or vertically as shown in Fig. 5. Under the arrangement shown in Fig. 2, the blocks 3 of the side rows with the exception of the inlet and outlet sections are arranged vertically while the remaining or intermediate sections are arranged horizontally. The inlet section 5 is preferably square'in cross section and the outlet section or block 6 corresponds in shape with the inlet section 5. The water enters the boiler at 7 and leaves the boiler at 8.

Each header also comprises a clamping frame as shown in Fig. 2, said frame comprising four clamping bars 9 each of which is reinforced by a trussing web 10. At the corners of the header, the bars 9 are secured together by fastening means 11 such as bolts. Under the arrangement shown in Figs. 1 and 2, the tubes are arranged in series, the water entering' at the intake orifice 7 passing lengthwise of each and every tube until it reaches the outlet orice 8.

Fig. 5 shows the tubes arranged in multiple series, in which case an intake manifold 12 is employed at the bottom of the boiler and an outlet manifold 13 at the top thereof. Theintake manifold 12 has a plurality of branches 14 one for each bottom block or section 3 and the outlet manifold 18 is provided with a corresponding number of branches 15 having the same numerical relation to the upper row of blocks or sections 3. As shown in Fig. 5 there are two rows 0f blocks or sections in communication with each branch 14C and each branch 15. This provides for a more rapid heating of the water and is particularly useful in steam boilers although the saine construction may be used in conjunction with instantaneous water heaters. Where the boiler is to be electrically heated, I insert between each vertical row of water tubes 4, an electrical heating unit designated generally at A and comprising a plate-like core 16 of insulating material having anges 17 at the top and bottom thereof. Wrapped around the core 16 is a resistance coil 18 the ends of which are connected to termina-ls 19 and 20 adapted to be connected by conductors to a source of electrical energy. By arranging an electrical heating unit between each two rows of tubes, the water in the heater may be quickly brought to the desired temperature 1or converted into steam if required.

The header sections are provided with screw plugs 2l in line with the ends Vof the water tubes, said plugs being removable for the purpose of cleaning the tubes.

In a boiler, headers arranged. in spaced relation to each other and each made up of a number of separable closely abutting rectangular and fiat-sided sections arranged in vertical and horizontal rows, Vthe sections of one header being arranged in staggered relation to the sections of the other header, water tubes arranged in pairs and having their opposite ends in communication with said header sections, the configuration of said sections being such that they may be arranged with each pair of tubes selectively in horizontal or vertical alinement with each other, a sectional and detachable clamping Vframe surrounding the entire group of secaround said core and having conductor terminals at the ends thereof. Y

In testimony whereof I aiix mysignature.

VSVVEN M. ANDERSON.

Copies of this patent may be obtained for ve cents each, by addressing' the fommissicner ofwlatentx,

, Washington, B. C. v 

